You can add a sales BOM to quotes and joblines as you would any other item code.
You cannot edit a line of a sales BOM once it is on a job, whether it is the quantity, a value or deleting an entire line.
You can however edit the BOM by right clicking on the BOM header which opens up another screen where changes can be made and then updated.
You can stock check the BOM and bring the items on to the job in a normal way. Likewise, you can import a quote that has a sales BOM.